US prosecutors said Friday they had charged two Myanmar citizens in a plot to attack the country’s UN ambassador, Kyaw Moe Tun, an outspoken supporter of the democracy movement who has refused junta orders to quit. In an alleged conspiracy foiled by US investigators, the pair spoke of hiring hitmen who would force Kyaw Moe Tun to resign or, if he refused, to kill him, officials said. FBI said law enforcement acted “quickly and diligently” after receiving a tipoff on the hit mission on Tuesday, according to court documents. Suspects Phyo Hein Htut, 28, and Ye Hein Zaw, 20, were being charged in a federal court in Westchester on counts for which they could be sentenced to up to five years in prison. Prosecutors said Phyo Hein Htut had been in touch with an arms dealer in Thailand who had dealings with the military in Myanmar. The arms dealer spoke to Phyo Hein Htut about hiring assailants for the plot, the criminal complaint said.